Descriptions

The BeagleBone LCD7 Cape provides an LCD solution with touchscreen capability for BeagleBone boards. The 7" TFT LCD screen, attached to the topside of the board, can display up to a resolution of 800x480 and is a 4-wire resistive touchscreen. The board is equipped with seven buttons located at finger-friendly positions. These buttons include power, reset, and five user buttons, which are mapped to different GPIO signals. The backside of the cape is where the BeagleBone and additional cape can be mounted.

FAQ

Revision Changes

Revision A3

In revision A3 the Enter button has been moved from GPIO3_19 to GPIO0_3 and LCD_DVDD_EN has moved from GPIO1_31 to GPIO0_2. These changes in GPIOs are to support awake interrupt in sleeping mode.

The PCB revision is also changed from BB-Bone-LCD7-PCB-03 to BB-Bone-LCD7-PCB-04.

Revision A2

The only design change in A2 is that the LCD_AVDD_EN signal is moved from pin 42
of connector J2 to pin 20 of connector J1. In revision A1, LCD_AVDD_EN signal is
mapped to GPIO0_7 which is also a DMA interrupt. By moving LCD_AVDD_EN
signal, this DMA interrupt is now available when BeagleBone is used with LCD7 Cape.
Both revisions should not have any functional difference.

The PCB revision is also changed from BB-Bone-LCD7-PCB-02 to BB-Bone-LCD7-PCB-03.

Revision A1

Initial release of BeagleBone LCD7 Cape

Known Issues

We have been reported by a small number of users that their LCD7 Capes revision A3 have some issues with BeagleBone Black. These issues could be hanging during boot or crashing when accessing Angstrom system menu. The LCD7 Cape was originally designed for BeagleBone (White), which boots from SD card. When using with BeagleBone Black and booting from eMMC, the integrity of eMMC signals on some LCD7 Cape may be affected. If your LCD7 Cape have this issue, there are three work-arounds below:

Boot your BeagleBone Black + LCD7 setup from SD card.

Cut 10 eMMC pins on connector J1 of your LCD7 Cape: 3-6, 20-25. You can visit this link for which pins are eMMC signals. The photo on the right shows J1 connector after the eMMC pins are removed.

Instead of permanently removing the eMMC pins on your LCD7 Cape, you can also use one of these Cape expansion connectors between the BeagleBone Black and LCD7 Cape. By using this connector, you can remove its eMMCs instead of the ones on LCD7 Cape. The photo on the right shows the Cape expansion connector is used and its eMMC pins are removed instead of the ones on LCD7 Cape.

Note: if using this method, you need to purchase 2 cape expansion connectors for use on J1 and J2.

Software Support

BeagleBone LCD7 Cape revision A1

Compatible with BeagleBone using Angstrom release 05-09-12 onward.

NOT compatible with BeagleBone Black

BeagleBone LCD7 Cape revision A2

Compatible with BeagleBone using Angstrom release 06-18-12 onward.

Compatible with BeagleBone Black using Angstrom release 2013-06-20 onward. However, only booting from SD card is supported. Note: Using Angstrom release earlier than 2013-06-20 on BeagleBone Black and LCD7 may DAMAGE your BeagleBone Black. Ensure you are using 2013-06-20 or later.

BeagleBone LCD7 Cape revision A3

Compatible with BeagleBone using Angstrom release 08-14-12 onward.

Compatible with BeagleBone Black using Angstrom release 2013-06-20 onward. Note: Using Angstrom release earlier than 2013-06-20 on BeagleBone Black and LCD7 may DAMAGE your BeagleBone Black. Ensure you are using 2013-06-20 or later.